Single-source training (#680)

* Single-source training

* Extract hyperparameters into seperate files

* weight decay scientific notation yaml reader bug fix

* remove import glob

* intersect_dicts() implementation

* 'or' bug fix

* .to(device) bug fix

utils/general.py

@@ -120,7 +120,7 @@ def check_anchor_order(m):
 
 def check_file(file):
     # Searches for file if not found locally
-    if os.path.isfile(file):
+    if os.path.isfile(file) or file == '':
         return file
     else:
         files = glob.glob('./**/' + file, recursive=True)  # find file